<template>
  <div>
      <div class="search">
          <input v-model.trim="keyword" class="search-input" type="text" placeholder="输入城市名或者拼音">
      </div>
      <div v-show="keyword" class="search-content" ref="search">
        <ul>
          <li class="search-item border-bottom" v-for="item in list" :key="item.id" @click="handleCityClick(item.name)">{{item.name}}</li>
          <li v-show="hasNoDate" class="search-item border-bottom no-data">sorry,没有找到相关的结果</li>
        </ul>
      </div>
  </div>
</template>
<script>
import {mapMutations} from 'vuex'
import Bscroll from 'better-scroll'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  methods: {
    handleCityClick (city) {
      this.mychangeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['mychangeCity'])
  },
  computed: {
    hasNoDate () {
      return !this.list.length
    }
  },
  watch: {
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.search)
  }
}
</script>
<style lang="stylus" scoped>
@import '~styles/varibles.styl'
 .search
   height: .72rem
   padding:0 .1rem
   background: $bgColor
   .search-input
     width: 100%
     heigth: .62rem
     line-height: .62rem
     text-align: center
     color: #666
     border-radius: .06rem
     padding: 0 .1rem
     box-sizing: border-box
 .search-content
   z-index: 1
   overflow: hidden
   position: absolute
   top: 1.58rem
   left: 0
   right: 0
   bottom: 0
   background: #eee
   .search-item
     line-height: .62rem
     padding-left: .2rem
     background: #fff
     color: #666
   .no-data
     text-align: center
</style>
